NOTE: As their name suggests hints are not exactly Game of Thrones cheats, and are usually just simple (but very useful) tips on how you can unlock secret level, features, find hidden areas and such. Hopefully these will make playing Game of Thrones even more entertaining.

Achievements
'Tis but a scratch ! (20): Chapter 9: suffer all the physical abuse during the torture sequence
Am I not merciful? (15): Chapter 8: save Orys from the City Watch
As high as honor (10): Finish chapter 12
Bloodhound (25): Chapter 7: find all the corrupt brothers of the Night's Watch
Clever dog (30): Gain all the skills linked to the dog with Mors
Collector (30): Seize the three objects of value from the Collector with Alester
Come try me (10): Finish chapter 11
Dark wings, dark words (10): Finish chapter 3
Dead men sing no songs (10): Finish chapter 6
Desecration (15): Chapter 8: find the key in Alester's father's tomb
Devout follower (30): Find all the statues of the Seven
Disciplinarian (10): Chapter 1: confront the four recruits during the training session with Mors
End of the line (20): Chapter 6: don't lose pursuit of the bastard
Endless watch (30): Send 10 recruits to the Wall with Mors
Family is hope... (10): Finish chapter 2
Family, duty, honor (10): Finish chapter 8
Fetch! (30): Use Mors' dog's sense of smell to find 5 secret objects
Fire and blood (10): Finish chapter 10
Golden touch (30): Acquire 1 golden dragon
Great teamwork (30): Finish the game without a single ally (except Mors and Alester) being KO'dGrowing strong (10): Finish chapter 13
Hear me roar (10): Finish chapter 4
Here we stand (10): Finish chapter 7
Know your place (15): Chapter 2: protect the nobility with Alester
Lesser of two evils (15): Chapter 14: come to the aid of the Reapers
Man of the people (15): Chapter 2: protect the people with Alester
Man's best friend (20): Kill 10 enemies with Mors' dog in skinchanger mode
Master of light and flame (30): Gain all the skills linked to R'hllor's fire with Alester
Master-at-arms (25): Learn all skills within a character's stance tree
Merciless (20): Mete out 5 deathblows
My darkest hour (10): Chapter 15: execute the judgement passed down on the Westfords
Once more unto the breach (35): Chapter 7: attack the camp without killing the sentries at the start
Pimp (30): Convince Bethany to return to Chataya's brothel with Alester
Proud to be faithful (10): Finish chapter 5
Quiet as a shadow (35): Chapter 13: reach Jeyne's room without ever being seen
R'hllor sees all (30): Find 10 secrets with the vision of R'hllor
Red priest of R'hllor (10): Finish Alester's story
Swift and deadly (35): Chapter 11: bring an end to the trial by combat in under 2 minutes
Sworn brother (10): Finish Mors' Story
The butcher comes to dinner (35): Chapter 9: kill 6 of Lord Harlton's soldiers during the fight at dinner
The Greatest (30): Emerge triumphant in the final arena combat
The night is dark... (10): Finish chapter 15
The true face of the Spider (10): Lose the final battle
Thorough (40): Complete all the secondary objectives of the story
True warrior (20): Kill 400 enemies
Unbowed, unbent, unbroken (10): Finish chapter 9
Unrivaled strategist (35): Chapter 12: take back Riverspring with a total victory
Valar morghulis (10): Finish chapter 14
Warlord (30): Reach the maximum level
Winter is coming (10): Finish chapter 1